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http://issues.ops4j.org/jira/browse/PAXRUNNER-85?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_10947
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Hendy Irawan commented on PAXRUNNER-85:
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>From the user standpoint, pax-runner is a replacement of Equinox/Felix so they
>expect it to behave at least as easy (and not more troublesome) than these
>engines.
I can run Equinox directly from NetBeans so it's pretty unfortunate that I
can't run pax-runner directly.
Maybe it's better to have it as a warning (ie. "WARNING: can't install url
stream factory... some features disabled") but the app still continues.
> Handle cases where a URLStreamHandlerFactory is already installed
> -----------------------------------------------------------------
>
> Key: PAXRUNNER-85
> URL: http://issues.ops4j.org/jira/browse/PAXRUNNER-85
> Project: Pax Runner
> Issue Type: Improvement
> Components: handler
> Affects Versions: 0.5.5
> Reporter: Stuart McCulloch
> Assignee: Alin Dreghiciu
>
> As reported by Hendy: when provisioning using NetBeans, an exception occurs
> because NB has already installed its own URLStreamHandlerFactory:
> java.lang.Error: factory already defined
> at java.net.URL.setURLStreamHandlerFactory(URL.java:1076)
> at
> org.ops4j.pax.runner.handler.internal.URLStreamHandlerExtender.start
> (URLStreamHandlerExtender.java:67)
> at
> org.ops4j.pax.runner.handler.internal.Activator.start(Activator.java:66)
> at org.ops4j.pax.runner.Run.createActivator(Run.java:405)
> at org.ops4j.pax.runner.Run.installHandlers (Run.java:175)
> at org.ops4j.pax.runner.Run.start(Run.java:134)
> at org.ops4j.pax.runner.Run.main(Run.java:481)
> Quick fix is to catch this exception and simply continue (although this will
> definitely limit the available functionality) - a better solution, which is
> used in several applications, is to use reflection to forcibly update the
> URLStreamHandlerFactory with the Pax-Runner factory and delegate to the
> original factory for unknown protocols...
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